And magdalena



(No Model.)

B IWANOWITSOH.

I SAFETY VALVE. No. 427,264. Patented May 6; 1890.

WITNEEBEEII.

UNITED STATES PATENT OFF-ICE. Y

RICHARD IWANOWITSCH, OF PENZING, NEAR VIENNA, ASSIGNOR OF TWO- THIRDS TOCARL PEKLINGER, OF FLORIDSDORF, AND MAGDALENA- KARDER, OF VIENNA,AUSTRIA-HUNGARY.

SAFETY-VALVE.

SPECIFICATION forming part of Letters Patent No. 427,264, dated May 6,1890.

Application filed October 30, 1889. Serial No. 328,668. (No model.)

To all whom it may concern: valve to be overloaded, as the shorter arm'0" Be it known thatI, RICHARD IWANOWITSCH, reaches into thelongitudinal slot 70 of the of Penzing, near the city of Vienna,Austriavalve-stem and comes in contact with the up- Hungary, haveinvented certain new and useper edge of the said slot. Before the arm 5ful Improvements in Safety-Valves, of which can come in contact with thelower edge of the following is a specification. the slot 10, when thelever is raised, the said This invention relates to an improved safe armcomes in contact .with the lower edge lof 5 5 ty-valve forsteam-boilers, according to which the slot f in the valve-casing, or isprevented the steam, which would issue from the valve from coming incontact with the lower edge l0 when the maximum pressure is exceeded, isof the slot kin any other appropriate manner. not, as customary, allowedto escape into the In order to prevent the safety-valve from open air,but is led through a branch pipe being tampered with, acap mis appliedto the arranged at a suitable part of the valve into upper part of thecasing, and is attached the combustion-chamber above the fire in suchthereto by means of a wire or its equivalent 1 5 manner that the firewill be damped aocordand a seal, such as n.

ing to the quantity of steam escaping through The above described safetyvalve with the safety-valve, thereby obviating the danspring 61 can beemployed for stationary boil- 65 ger arising from increase ofsteam-pressure ers; but a direct weighting of the valve acan andreducing the said pressure to its normal be employed, if desired, inwhich case, how- 20 point. ever, it is better to inclose-the lever andthe In the accompanying drawing, my imweights in a casing of wire-work,which can proved safety-valve is represented in vertical also beprotected from being tampered with Sectionby being sealed in anysuitable manner.

The valve-cone a is weighted by the screw Having now particularlydescribed and as- 2 5 b, a helical spring d, or other weight,accordcertained the nature of my said invention and ing to the highestpermissible steam-pressure. in what manner the same is to be performed,

In order to protect the spring (1, the same is I declare that what Iclaim is provided with a movable packing, piston- In safety-valves ofthe kind hereinbefore ring, hemp ring, or the like, a Ramsbottom setforth, a valve-casing f, having a valve- 0 piston e being represented bythe accorncone alocated therein and connected to the panying drawing,and, as is evident, the nut piston-rod 6, said cone a being weighted inc of the regulating-valve adjusts the tension accordance with thehighest permissible pressof the helical spring d and is prevented fromure in the boiler by means of a spiral spring making any retrogrademovement by means d, means, such as the cap m, for retaining 35 of alock-nut c. the spring under pressure, and a screw, such Thevalve-casing f is provided with abranch as b, a regulating devicecomprising the nut pipe g, arranged between the valve-cone a and c,lock-nut c, and a two-armed lever i i, piv- 8 5 the piston (2, saidbranch pipe being connected oted in lateral lugs It, all in combinationwith to a tube g, which is continued into the coma branch pipe such asg, and arranged to op- 0 bustion-chamber and leads the steam from eratesubstantially as and for the purpose set excessive generation issuingthrough the safeforth in the foregoing specification, and shown ty-valveto the fire, whereby the latter is more in the accompanying drawing. orless damped, according to the quantity of In witness whereof I hereuntoset my hand steam passing the safety-valve, and in this in presence oftwo witnesses.

45 manner the pressure in the boiler is reduced to RICHARD IWANOWITSCH.

its normal point. A lever i, which has its ful- Witnesses: crum inlateral lugs h, permits the safety- RUDOLF VON PLANK, valve to belifted, but does not allow the said NETTIE S. HARRIS.

